Volume 5, Issue 6 pp. 500-502
Research Article

Metal complexes with tetrapyrrole ligands: Part LXXVII . New osmium complexes of the 5,10,15,20-tetrakis-(4-carboxyphenyl) porphyrin

Johann W. Buchler

Johann W. Buchler

Institute for Inorganic Chemistry, Technical University of Darmstadt, Petersenstraße 18, D-64287 Darmstadt, Germany

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Joachim R. Simon

Corresponding Author

Joachim R. Simon

Institute for Inorganic Chemistry, Technical University of Darmstadt, Petersenstraße 18, D-64287 Darmstadt, Germany

Dr Theodor Schuchardt & Co., Eduard-Buchner-Straße 14-20, D-85662 Hohenbrunn, GermanySearch for more papers by this author
First published: 15 May 2001

Part LXXVI: Ref. [ 1].

Abstract

The synthesis and characterization of new alkali-soluble osmium tetraphenylporphyrinates, complexes of the 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin Os(tH4cpp)L2 and Os(tH4cpp)LL′ (2a–j), is described. 2a–j are obtained from the corresponding new osmium porphyrinates Os(tmecpp)L2 and Os(tmecpp)LL′ (1a–k) by alkaline saponification and precipitation with hydrochloric acid. In fact, the osmium(II) porphyrinates 2c–f as well as 2i–j are oxidized to the osmium(III) porphyrinates Os(tH3cpp)L2 (3c–f) and Os(tH3cpp)LL′ (3i–j) in the presence of air, as confirmed by UV-vis spectroscopy. Copyright © 2001 John Wiley & Sons, Ltd.

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